Add .net6 support

Author: FreePhoenix888

.github/workflows/CD.yml

@@ -34,7 +34,7 @@ jobs:
         with:
           submodules: true
       - name: Test CSharp
-        run: dotnet test -c Release -f net5
+        run: dotnet test -c Release -f net6
 
   deploy:
     needs: [testCpp, testCSharp]

csharp/Platform.Collections.Benchmarks/Platform.Collections.Benchmarks.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net472;netcoreapp3.1;net5</TargetFrameworks>
+    <TargetFrameworks>net472;netcoreapp3.1;net5;net6</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>

csharp/Platform.Collections.Tests/Platform.Collections.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;netcoreapp2.1;netcoreapp3.1;net5</TargetFrameworks>
+    <TargetFrameworks>net472;netcoreapp2.1;netcoreapp3.1;net5;net6</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>

csharp/Platform.Collections/Platform.Collections.csproj

@@ -6,7 +6,7 @@
     <AssemblyTitle>Platform.Collections</AssemblyTitle>
     <VersionPrefix>0.3.1</VersionPrefix>
     <Authors>konard;tynkute</Authors>
-    <TargetFrameworks>net472;netstandard2.0;netstandard2.1;net5</TargetFrameworks>
+    <TargetFrameworks>net472;netstandard2.0;netstandard2.1;net5;net6</TargetFrameworks>
     <AssemblyName>Platform.Collections</AssemblyName>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <PackageId>Platform.Collections</PackageId>